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to linearize the convective term in OF...

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Old   October 18, 2012, 04:54
Default to linearize the convective term in OF...
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Tom
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Hi there,

I have to insert in the equation this term:

(U_j+Ug_j)*d(U_i+Ug_i)/dx_j

where Ug_i are the components of a given velocity field and U_j are the component of the velocity I want to solve to. This above is the convective term in the expression "u*grad(u)"-like. I know OF prefers the "div(u X u)" form and even that a volume velocity flux "phi" must be introduced. By the way in the case of the given Ug velocity field I even have its flux field, and they do not change in the PISO scheme...

-how can I do? Is it possible?
-How does the pressure equation change?

Thank you in advance!
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